Multiple-spindle drilling-machine.



H. P. MOORE & F. H. GRIFFITHS.

MULTIPLE SPINDLE DRILLING MACHINE.

APPLICATION FILED APR 7, I915.

b w n W a W W I n WWW/Z W6 0 w 4 4") I Z d W e 5 WW W W W W I W a m M n 6 H W W i W W 6 J W W W W W W W W W, m W 0 w w 7; a, d ml m% m & I W W M1 a w m 6 x W W W m m a n m H. P. MOORE & F. H. GRIFFITHS.

MULTIPLE SPINDLE DRILLING MACHINE.

APPLICATION FILED APR. 7, I9I5.

Patented June 13, 1916.

4 SHEETS-SHEET Z.

H. P. MUURE (KL F. H. GRIFFITHS.

MULTIPLE SPINDLE DRILLING MACHINE.

APPLICATION FILED APR. 7, 1915.-

1 1 87, 3 6 5 PatentedJune 13, 1916.

4 SHEETSSHEET 3.

wwr g H. P. MOORE & F. H. GRIFFITHS.

MULTIPLE SPINDLE DRILLING MACHINE.

Patented June 13, 1916.

APPLICATION FILED APR. 7 1915.

UNITED STATES PATENT OFFICE.

HOWARD PERCIVAL MOORE AND FRANCIS HENRY GRIFFITHS,' 0F BIRMm'G-HAM,

ENGLAND.

MULTIPLE-SPINDLE DRILLING-MACHINE.

Specification 01 Letters Patent.

Patented June 13, 1916.

Application filed April 7, 1915. Serial No. 19,843.

To all whom z t may concern Be it known that we, HOwAni) PERCIVAIi" at Priory \Vork s, Priory Road, Aston. Birw mingham, England, and 8 Mayfield Road. Handsworth, Birmingham, England;-reepectively, have invented certain new and useful Improvementsin Multiple-Spindle Drilling- Machines, of which the following is a specification.

The invention provides an improved automatically acting vertical drilling machine of the multiple-spindle concentric-kind, particularly suitable for drilling various kinds lifted by frame supports a from the ground.

of small articles.

In the machine according to the invention a combination of parts is provided .whereby the drilling spindles may be conveniently set either vertically or inclined upon supports which move around 'With a revoluble but otherwise stationary table which is positioned below the drills and carries a number of fixed and preferably interchangeabl 'work holders, means for automatically advancing the drilling spindles to the holders being applied above said spindles at the head or top of the machine in the form of stationary cam, inclined plane on other suitable devices contacting the upper ends of the spindles as the table, holders, and supports revolve about a common axis. Two, three, or more drilling spindles maybe arranged upon the supports for each and'everywvor-k holder, and the latter and the table are fitted with vertically operating plunger-like grips which are spring moved to hold the work to the holders, arid positively movedto release the work by devices arranged below the surface of the table. around a central column which centralizes the revolving table, and the drive for the table is arranged underneath the'be'd. The plungers holding the work in positionon the work holders are operated to'release the work by a cam applied to the stationary bed of the machine underneath the revoluble table. W

The invention is illustrated by the accompanying sheets of drawings.

Figure 1 shows a vertical section, with some of the parts in elevation, of the principal features of the machine. Fig. 2 is a horizontal section of Fig. 1 on thedotted lines A. Fig. 3 is a horizontal section of The machine is built 7 Fi .1 on the dotted lines B. Fig. 4 shows an'elevation of a part of the machine Fig. 1.

illustrating the arrangement of a pair of SplndlQS in respect of a work holder. Fig. '5 1s a plan on a' smaller scale of the cam which automatically operatesto release the work from the work holder. Fig. 6 is an underside plan on a smaller scale of the cam or inclined plane surface'which automatically operates to feed the drillsor other tools.

Fig. 7 illustrates diagrammatically one manner of applying the driving belt to the pairs of spindles arranged according to the invention.

The stationary bed of the machine is at a frame arm 0 is a truly vertical shaft orcolumn d aropnd which the whole of the machine is built. Revoluble around the shaft d is a work table e carrying a number of work holders 6 which are interchangeable and arranged a distance apart in a circle near the e, and-is positively revolved upon the bed .8

v by a gear such'as the bevel wheel 6 rigidly attached to the underside of the table, a bevel, pinion, e gearing with said bevel wheel and revolved by a short shaft 6, having bearings within the bed, and a plain toothed gear a revolving the shaft 6 from a cone pulley 6 said table being in this way conveniently driven from its underside in a substantially concealed manner.

Rigidly secured within a'ring recess f? .of the bed a is a. cam piece or lift 7, which in conjunction with the bottom surface of the recess forms a cam ring. Carried by the table 6 to be operated upon by the cam piece f are a number of vertical lungers 'g, one for each work holder 6 ach plunger is downwardly traversed by a coiled spring 9. The lower end of the plunger is provided witha roller 9 to contact the campieoe. f, and the upper end of 831d plunger is pro vided with an adjustable grip g operative from the spring 9 to hold the work-down in a matrix h of the work holder 6 the release of the grip being by the lift of the plunger from the cam piece f.

In Figs. 1 and 3 a hat and coat hook 2' is shown held down in the matrix h of the work holder while the operation of drilling it takes place, and it is a feature of this holding down that same is performed in a resilientmanner while the plunger is off the cam piece 7, and that the release of the work is positively carried out. Any suitable form of grip may be used on the plunger 57, but when adjusted it is a fixed part of the plunger which is always carriedaround with the table 6.

For each work holder 6 a pair of drilling spindles m and n are provided. The bearings m n for these spindles are adjustably carried upon outwardly extending supports 0 and 1' formed integral with a sleeve 8- loosely fitting over the shaft d and at its lower end a rigidly bolted to the work table 6, said supports being common to all the pairs of spindles and always revolving with the table a. The construction of the drilling spindles and their bearings and the manner of application the one to the other forms no real part of the invention, but it is necessary for each spindle to be independently traversed in a direction away from the wor by a spring q, and always toward the work in a positive manner, and that the aims of each spindle may be set either vertically or inclined upon the supports 0 and 1'. If the spindles are driven by a single belt, the belt pulley t of each spindle is also made to independently slide upon its spindle so as to compensate for the inclined position of the two spindles in respect of each other, the drawings showing an arrangement wherein a single belt drives all'the spindles, but leaves a number of them stationary while the work is being changed in respect to the work holders,

Supportedby a fixture near the upper end of the shaft d is the cam head u adapted to operate against the upper ends of all the drilling spindles for the purpose of-feeding or moving the drills downwardly gradually into operative position. The face u of the cam head is of ring form, and may formthe active surface of a cam plate a which is an interchangeable feature in respect-of the head, so that the drillsmay be moved or fed to operative position at various rates of speed and various operations be obtained by the requisitely shaped cam.

It will be clear that the cam head is a fixture, and that the spindles revolve with the table and always hear at their upper ends against the'underside of said cam head by the operation of the spring q, an antifriction ball, w, being applied between the end of each spindle and the cam face M.

The drills of the drilling spindles are indicated at 00, but it is quite clear that same may be boring bits or any cutting tool which may become operative in a drilling spindle.

In the varrangenient'shown in the drawholder operative, and the left hand side a drill spindle stationary and the work holder inoperative.

lVith the machine aforesaid there is no waiting for the work to be drilled, as the operator of the machine is uninterruptedly feeding work, and the drilling of many arti- 'cles is uninterruptedly taking place, one or two holes at a time, each time the work table makes a revolution, and, further, the feed of the drills is gradual and not under the control of the person feeding the work, so that the drills last longer without grinding.

Having now particularly described our invention what we claim and desire to secure by Letters Patent is 1. An automatic drilling machine of the character described comprising a revoluble table, a number of fixed and interchangeable work holders carried by the table, a plurality of drilling spindles disposed above said table and said holders, supporting means for said spindles and revoluble with said table, said spindles being arranged in the supporting means to be set either vertically or inclined, and cam means arranged above the drilling spindles to automatically operate against the upper ends of said spindles, substantially as described.

2. An automatic drilling machine comprising a revoluble table, a number of fixed and interchangeable work holders carried by said table, a plurality of drilling spindles disposed above said table and saidholders, a pair of said spindles being provided for each holder and applied to supports moving around with said table, said spindles being arranged in the supports to be set either vertically or inclined, and fixed cam members arranged above the drilling spindles to automatically operate against the upper ends of said spindles, substantially as described.

3. An automatic drilling machine comprising a revoluble table, a number of fixed and interchangeable work holders carried by the table, a plurality of verticallyoperating grips spring 'moved to hold the work in the work holders and positively moved to release the work by devices arranged below, the surface of the table, a plurality of drilling spindles disposed above said table and said holders and applied to supports moving around with said table, and cam means arranged above the drilling spindles to automatically operate against the upper ends of said spindles, substantially as described.

4. An automatic drilling machine comprising, a revoluble table, a number of fixed and interchangeable work holders carried by the table, a plurality of vertically operating grips spring moved to hold the Work in the work holders and positively moved to release the Work from said holders, a plurality of drilling spindles disposed above said table and said holders, supports for the spindles and permitting vertical and inclined adjustment of the latter, said supports movable With said table, and cam means arranged above the drilling spindles to automatically 15 operate against the ends of the latter.

In testimony whereof We have hereunto set our hands in presence of two subscribing Witnesses.

HOWVARD'PERCIVAL MOORE.

FRANCIS HENRY GRIFFITHS.

\Vitnesses i GEO. FUERY, D. LEAKER. 

